All categories

3 years ago

A halogen is example of a(n)

1 answer:

6 0

A halogen is example of nonmetal. The answer is letter A. When compounds containing halogens they are called salts thus the name “salt – former”. Halogen consists of Fluorine, Chlorine, Bromine, Iodine, Astatine.

You might be interested in

A common cooking vinegar is 5.0% acetic acid (ch3cooh. how many molecules of acetic acid are present in 41.9 g vinegar?

UkoKoshka [18]

To calculate the number of molecules ch3cooh in a given amount of vinegar, we first need to determine the amount of ch3cooh in the solution by multiplying the percent ch3cooh with the sample amount. Then, convert g to moles and use avogadro's number. We do as follows:

41.9 g vinegar solution ( .05 g ch3cooh / g vinegar solution ) (1 mol / 60.05 g ) ( 6.022x10^23 g / 1 mol ) = 2.1x10^22 molecules ch3cooh

6 0

3 years ago

What volume of water is needed to make up a 6.00% (m/v) solution of copper (II) sulphate when 12.0 g of it will be added to wate

8_murik_8 [283]

Answer:

200 mL of water is needed to make up a 6.00% (m/v) solution of copper (II) sulphate when 12.0 g of it will be added to water.

Explanation:

The solution is the result of the mixture between the solute, which is the substance that dissolves, and the solvent, which is the substance in which a solute dissolves. That is, a solution (or solution) is a mixture of two or more components, perfectly homogeneous since each component is intimately mixed with the other.

The concentration of solutions is the amount of solute contained in a given amount of solvent or solution. A unit of concentration is the percent weight to volume.

The percent weight to volume is the percentage ratio between the weight of the solute and the volume of the solution. It is calculated as:

$Percent =\frac{mass of solute}{volume of solution} *100$

Mass is measured in grams, while volume is measured in mL.

In this case:

Percent weight to volume= 6%
mass of solute= 12 g
volue of solution= ?

Replacing:

$6=\frac{12 g}{volume of solution} *100$

Solving:

volume of solution*6= 12 g*100

$volume of solution=\frac{12 g}{6} *100$

volume of solution= 200 mL

200 mL of water is needed to make up a 6.00% (m/v) solution of copper (II) sulphate when 12.0 g of it will be added to water

8 0

3 years ago

Which process is a chemical change?

Kaylis [27]

Answer:

breaking glass

Explanation:

breaking glass cant be reversed

4 0

3 years ago

David's body breaks down the sandwich into small enough molecules that can be absorbed through his intestinal lining and then in

viva [34]

break down food into smaller molecules the body can use; absorb molecules into blood and carry them throughout the body; eliminate wastes from the body

4 0

3 years ago

Read 2 more answers

If one mole of caffeine has a mass of 194.19 g and you drink an average of two servings of this drink a day, how many caffeine m

Marina86 [1]

The standard cup of coffee sold in coffee shops have a serving size of 6 ounces. Since there are 28.3495 g in 1 oz, that is equivalent to 170.097 grams. Since you drink two servings, the total mass is 170.097×2 = 340.194 g. Using the molar mass (194.19 g/mol) and the Avogadro's number (6.022×10²³ molecules/mol):

340.194 g caffeine(1 mol/194.19 g)(6.022×10²³ molecules/mol) = 1.055×10²⁴ molecules

4 0

3 years ago